Cover for gas-purifiers.



Patented VJuly 2, I90l.

No. 677,639. T. S. CLAPHAM.

COVER FOB GAS PURIFIERS.

(Application led Peb. 23, 1901.) (llo Model.) 4 4 Sheets-Sheet l.

No. 677,639. Patented my 2, |901. T. s. cLAPHAm.

`CVER FOR GAS PURIFIEBS.

(Application med Fb. 2S, 1901.) (No Model.) 4 Sheets-Sheet 2.

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(Application led Feb. 23, 1901.) (No Model.) 4 Sheets-Sheet 3.

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T. S. CLAPHAM. COVER FOR GAS PURIFIERS. (Applicanin md Feb. 2a, 1901.) (No Model.) 4 Sheets-Sheet 4.

FEE m www l @m 4f t ab? UNITED STATES PATENT OFFICE.

THOMAS S. CLAPHAM, OF-KEIGHILEY, ENGLAND.

COVER FOR GAS-PURIFIERS.

SPEIFGATION forming part 0f LetteiS Patent No. 677,639, dated July 2, 1901. Application filed February 23, 1901. Serial No. l18,513. (N0 IIlOdeL) To LZZ 1071.071?, t may concern.'

Be it known that I, THOMAS SrowELL OLAP- HAM, a subject of the King of Great Britain, and a resident of 14 Devonshire street, Keighley, in the county of York, England, have in- Ven ted certain new and useful Improvements vin Covers or Lids for GasPurifiers, of which and read justment may be easily efected. To y attain this object, I make use of the devices constructed and arranged to operate as hereinafter described andas illustrated in the accompanying sheets of drawings, in which- Figure l is a sectional elevation of the upper wall or covering of a tank, showing the lid or cover removed or raised from it. Fig. 2 is a similar view to Fig. 1, but shows the lid or cover fixed in position on the tank. Fig. 3 is a plan of the lid and a part of the upper wall of the tank surrounding it. Fig. 4 is an elevation drawn to an enlarged scale, showing the construction of the edges of the Y lid and the'parts of the tank in connection with which it is to lit, as well as the means whereby the one is forced and held in contact with the other. Fig. 5 is a View of the parts shown by Fig. 4, as seen in the direction indicated by the arrow fr. Fig. 6 is a similar view to Fig. 5, but shows a modification hereinafter explained.

Similar letters of reference indicate similar parts throughout the several views.

A indicates the upper wall or covering of the tank, and B a flange mounted thereon and made to surround the opening therein to receive the cover.

In carrying my invention in'to effect I form the jointing surfaces or edges of the covers ct to receive dovetailed or otherwise appropriately-shaped holding-bars b to receive strips or bandsof india-rubber or otheryielding 'or elastic substance c ot'- a suitable form or shape in cross-section to fit tightly and firmly into the grooves in said holding-bars b, as well as to be of an appropriate shape for fitting against the upper surfaces of the flange B, against which they are pressed or forced in order to form a perfectly gas-tight joint therewith. I

As means for forcing or pressing the parts a, l), c, and B firmly together, as described, I employ a series of eccentrics d, (shown in broken lines, Figs. 5 and 6,) mounted upon shafts e, arranged to carry flanged bushes f f so that although such shafts are square in crosssection they may freely and smoothly revolve for the reason that these cylindrical bushes ff take into circular openings made in the projecting ribs g g of the flange B. The eccentrics d, which are of a plain simple form, are kept or maintained intheir proper positions by being mounted between them, 'as are also the straps or connecting-rods h h, taking over same. The extending ends of these straps h h have a screw-thread formed on them to receive the hooks or holding-arms 7c k, which may thus be adjusted upon them and there further secured by the nuts m m. By these means I am enabled to firmly force the lid or cover ot into position by the turning of the shafts e by means of keys n, as shown in broken lines, Fig. 5, (and which may be applied at any part of said shafts e) or by means of any appropriate handle-levers secured to same. I may further arrange all the shafts e to be coupled together by bevel gear-Wheels at their extremities, so that they may be 0perated simultaneously.

To prevent the hooks k 7c from slipping or being drawn from pressing against the lid a, I form extensions on them to receive the taper wedges p p, reaching down into the recess in` the lid a, as shown by Fig. 5, or I turn the outer edges a' of the lid a slightly upward, as shown by Fig. 6, to receive the cross-pieces or jaws of the hooks 7c k, or I may extend the edges so that they will overhang the shafts c,

vin order that the pull of these latter will be in such a direction as to force the hooks towardinstead of drawing them from said lid a.

Iam aware that the formation and construction of the several parts herein described may be considerably varied to meet the requirements of the different conditions under which IOO they are to be used and that Without departing from the nature of my invention; but

What I claim as my invention is- 1. In apparatus of the class described, the combination with an upwardly extending flange surrounding the opening of the tank or receptacle, of a lid or cover therefor fitting within said iiange and having an outwardlyprojecting portion overhanging said flange, and having holding-bars on the under sides thereof said holding bars being dovetailshaped in cross-section, rubber strips secured in said holding-bars, and clamping means eX- tending from a point below the upper edge of said iange and upward andover the projecting portion of the cover and adapted to draw the strips of the cover tightly down'upon saidj flange.

2. In apparatus of the class described, the, combination with an upwardly extending flange surrounding the opening of the tank. or receptacle, of a lid or cover therefor tting'; withinsaid iange and having an outwardly-r projecting portion over-hanging said flange, elastic packing carried `by said outwardly-l; projecting portions, and a plurality of sirnul-i taneously-operatcd hooks adapted to bear on@ the upper portion of. the cover to draw thei cover down upon said flange. 2

3. In apparatus of the class described, they combination with an npwardlyextending@ flange surrounding the opening of the tank?. or receptacle, of a lid or cover therefor fitting?` within said lange and having an outwardly-2 projecting portion overhanging said flangej elastic packing carried by said outwardly- 4tially as herein specified..

projecting portions, and a plurality of simultaneously-operated hooks adaptedto bear on the upper portion of the cover to draw the cover down upon said flange, said hooks having means whereby their overhanging portions may be independently adjusted.

4. In apparatus of the class described, a lid or cover, a yielding substance mounted to intervene between same and the part against which it has to fit, hooks for laying hold of said lid, connecting-rods and eccentrics for operating said hooks and shafts upon which Vsaid eccentrics are mounted substantially as herein specified.

5. In apparatus of .the class described, a lid or cover, a yielding substance intervening between same and the other parts, hooks for laying hold ot' said lid, connecting-rods and eccentrics for operating said hooks, square shafts upon which said eccentrics are mounted vand bushes to form the rotarybearings for said square shafts substantially'as yherein set forth.

G. In apparatus of the class described, a lid or cover, a yielding substance beneath said lid, means for holding down said lid, shafts for operating said means gears for coupling said shafts together and handle devices for transmitting motion to said shafts substan- In testimony whereof I have afixed my signature in presence ot two Witnesses.

THOS. S. CLAPHAM.

Witnesses:

SAMUEL HEY, JOHN WHITEHEAD. 

